木工刀具的磨损在许多情况下是由于进给速度过慢而产生的。所以讨论刀具的磨损须考虑进给速度。下面是几个有关进给速度的简单关系式:刀痕数/寸(工作长度)=(刀片数×刀轴转速)/(进给速度×12)……(1) 例如:(4片刀×3600转/分)/(60呎/分×12吋/呎)=20刀痕/吋若把进给速度改为20呎/分,则得到60刀痕/吋 Woodworking tool wear is in many cases due to the slow feed rate. So to discuss the tool wear must consider the feed rate. The following is a brief description of the feed rate: Knife / inch (working length) = (number of blades × spindle speed) / (feed speed × 12) For example: (4 blades × 3600 rpm / 60 feet / minute × 12 inches / foot = 20 marks / inch If the feed speed is changed to 20 feet / minute, 60 knots / inch